Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b97a11a9439c45e…

MALICIOUS

PDF

72.0 KB Created: 2021-09-22 17:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e1dbb9d984efafa968194d6c30f19314 SHA-1: f6f1fcfced23d8af47444b69698c30f858cccb1d SHA-256: 4b97a11a9439c45e4a4d57a6a6fd48a935732e57eb33e9623e6ddfc5463553d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. These links likely serve as lures for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mayinmaunhat.com/upload/files/15531160864.pdf In PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/m0ncblmhrob053i2givv7kjh45/31503433799.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/73ff49bacc346e8d2d24009d557d0f93/daveperi.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/95109754727.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/86821617790.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365b8844f54---16431738091.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161487e0fab666---wejif.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/68630173480.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/59452730456.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/fifonunizoduwitopigipa.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/77122736237.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/54447685556.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/38069276527.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wimilis.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/b801872033cc447dd648b4c0071e0d8b/30627790837.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/3625046602.pdfIn PDF document text
    • http://garderoba.sk/images/_file/nexasivenasovafolinor.pdfIn PDF document text
    • http://chiron-ventures.com/chiron/home/img/upload/files/2109030321057747165nuat.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/96512545427.pdfIn PDF document text
    • http://xaydunghoangthanh.com/img_duhoc/files/gabonekogisusoxomajetotew.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/mabuboxusatiluvi.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/nidoj.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35750793152.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/nuwekej.pdfIn PDF document text
    • https://music-group-store.com/upload/files/xavofamakibijakogol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=pokemon+x+and+y+mod+apk+downloadPDF link annotation

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